Pressing mechanism



Dec.. 7, 1943. R. KRASBERG PRESSING MECHANISM Filed ot. 7, 1940 -2 Sheets-Sheet 2 IN VENTOR. rmqy Mfj r The foregoing andnumerous other'objects a fl ,h UNlTyED STATES PATENT. OFFICE rnnssme MECHANISM;

ApplicationOct'oberfl, laiopseiiai die itian-4,1 1 l v @11 Claims- (or; 16 9 i This invention relates generally to presses and more particularly to pressing mechanisms of the,

manually operable type adapted for generaluse in machine shops and manufacturing institu' tions. f- I am familiar with conventional types of manually operable presses which have, been available forgeneral shop use. Inthisvconnection 'I refer, for example, to ,press esflkn'own aszarbor presses whichhave'been in common use for many years. These conventional presses with which I am familiar present certain disadvantagesand inconveniences, particularly in connection with precision work, which the present invention con:

templates overcoming. Thus, ion example, the

present invention conteinplatesja press which is more durable incohstructionarid themoving parts of which are moreaccurate inftravelthan conventional presses with which j' I, am familiar and which may be very economicallyproduced by the practice of conventional machineshop' methods. M

More specifically, the invention contemplates a general utility press. adapted for .use for press: l u .t itn and a second boss 14 pos tionedto:

ing operations where accuracy is not of par. ticular importance and at fthe same time adapted to be used for precision ,work.-[ That is to say, the construction of .the press contemplated by the present invention is such that while the device may be employed for general pressing, operations it has the distinct advantage of being (capable-for use in precision die work; Certain forming dies require precision accuracy while others permit of wider tolerance limits. Another object of the present invention is to provide a pressing mechanismlof the type set forth above wherein improved means is' provided in' association with a vertically shiftable pressing element for securing said element againstilateral misalignment 1' a i It' is a further object otsthe present invention to provide a pressing device, asabove set "forth", which is conveniently portable and very compact aswell as sturdy in constructiomthe constituent elements thereof being relatively few in number and simple inform. 1 i A still further object of the present' invention is to provide a pressing mechanism for general shop use which is equipped with improved-pram tical features'of 'adjustment to accbrnmodatethe a a s, W1 .b m mf npar nt' mi e 9 lowing detailed description when considered in connection with the accompanying drawingswherein:---- 1 i n Fig. Us a perspective view of ,a press or mech: anism embodying features-contemplated by the present invention; 1 i Fig. 2-is a vertical-centralsectionalview of the devicetakensubstantially along the line 2--2 .;l; Fig;:3 is a horizontal transverse sectional view takensubstantiallyalongthe line 3--3 oiFig. 2; Fig. 4 is a horizontal transverse sectional view taken j substantially along the line 4-4 ofli'igl 2; 1 Fig.; 5;is; a, front ,elevational yiew of the press;

1 Fig. 6 is afragmentaryyerticalsectional view similar to the sectional view of- Fig. 2- disclosing thevertically shiftable-pressing element or memher in its lowermost position. -Referringanow: tothe drawings 7 wherein like numerals have been employed-to designate similar parts throughout thevarious figures, it will be seen, that my invention contemplates apress haying a base-JD havin -lacentralboss [2 ex tending upwardly therefrom and formed integral ward-the rear-of the base and joinedto the boss 12 by a,connecting web HZ.- A work receiving portion or-surface l8 traverses theupper side of the base 10 at the front thereof and is provided with .suitable threaded apertures to receive worksecuring screws (not shown) and an un-i threadedcentra'l aperture 22 particularly designed to receive such elements as the shank-of a die, member or the like... cooperatively arranged with respect to the aperture .22 Visa clamping or set screw which is designedto be tightened against the element received within the la 'erture n. ,I

. Theboss' l2 'rovides thelowe'r support for a vertical shaft .26, saidshaftbeing secured against axial and frot'ativ e movements ,by a suitable set screw 28 which eiitend's'thrpugh theiboss l2 and into the, shaft 26.. Extending" upwardly fro and secured Within 'thdboss l4 is, a second smaller shaft 30,, said shafts. and 30 beingdisposed in absolute lparallelism f w The upper extremity of the" larger, centrally disposed sh t 26. providesa upportif aframe structurefil f'Thi's-frame structure 32 isprovided with a central boss 3'4 which encircles the upper e e it of th "sha 2 "A. 13 S rew 1 x 'ds ihmu h ih 'bq 'e' sl e e .34. a d is d si nedat l ts'i in'e ertr rtq n l ck th n one O a, series {of {apertures 3itpiov dfiid in the shaft The particular aperture "38 with" which the associated with said base structure beneath the pqrtionof the slide -f ramef connectedwith said actuator member, and means associated with said 1 slide: frame structure in the vicinityof the lower extremity f said actuator member I for accommodating a-pressing tool 1 7 ,1

curate: parallelism, a rackv andwpinion imechae nism carried by said ,frame including afvertically shiftable rack member, means coupled with saidpinion for effecting rotation thereof "and conse quent movement of said rack; member,- .a "slide frame structure connected with the. lower fex? tremity of said rack member and'interposed betweenthe aforesaid frame and basestructures, said slide frame structure being slidable upon and accurately guided by said upright parallel elements in response to' movement of said rack member, a work supporting section associated with said base structure beneath the portion of the slide fram connected with said rack mem-- ber, and means associated with said slide frame structure in the vicinity of the lower extremity of said rack member for accommodating a press.- ing tool.

4. A portable type press mechanism including a base structure, upright elements extending from said base and presenting spaced parallel guide surfaces, a frame structure vertically spaced from said base and affixed to said elements so as to cooperate with said base structure in maintaining said elements in accurate parallelism, said frame structure presenting a section extending laterally from one of said upright elements to provide a support, an actuating mechanism carried by said support including a vertically shiftable actuator member and a rack and pinion mechanism operatively associated therewith, a slide frame structure connected with the lower extremity of said actuator member and interposed between the aforesaid frame and base structures, said slide frame structure being slidabl upon and accurately guided by said upright parallel elements in response to movement of said actuator member, a work supporting section associated with said base structure, and means on said slide frame structure for accommodating a pressing tool.

5. A portable type press mechanism including a base structure, upright elements extending from said base and presenting spaced parallel guide surfaces, a frame structure vertically spaced from said base and affixed to said elements so as to cooperate with said base structure in maintaining said elements in accurateparallelism, an actuating mechanism carried by said frame including a vertically shiftable actuator member and a rack and pinion mechanism operatively associated therewith, a slide frame structure connected with the lower extremity of said actuator member and interposed between the aforesaid frame and base structures, said slide frame structure being slidable upon and accurately guided by said upright parallel elements in response to movement of said actuator member, a work supporting section associated with said base structure, means associated with said slide frame structure for accommodating a pressing tool, and means for adjustably limiting the stroke of said slide frame.

, stated 1, 'Al portable-ty'pefpress mechanism. including a. as'e'structure, uprightelements extending from said, ,baseiand I presenting. spaced parallel guide surfaces, aframe structure vertically spaced from said ibaseandaflixed to said elements so as to cooperate with said base structure in maintaining said elements in accurate parallelism, an actuating mechanism carried 'by said frame including L, A a yertically. shi table. actuator member and a rack 10 and: pinion mechanism operatively associated therewith, aslide frame structure connected with t e lowerextremity of said actuator member and interposed betweenthe aforesaid frame and base structures, said slide-frame structure being slidableluponand-accurately guided by said upright parallel elements in. response to movement of said actuator member,.,awork supporting section associated with'said base structure, means associated with. said slide frame structure for accommodatinga. pressing tool, and means including an up Ii ht .member adjustablysecured at its lower extremity to said; slide'frame for limiting the stroke o fsaid slide frari'ie. p -KIA portable type press mechanism including a as tree structure, upright elements extending from said base and presenting spaced parallel guide surfaces, a frame structure vertically spaced from said base and affixed to said elements so as to cooperate with said base structure in maintaining said elements in accurate parallelism, an actuating mechanism carried by said frame including a vertically shiftable actuator member and a rack and pinion mechanism operatively associated therewith, means for securing said frame structure to at least one of said upright element in various positions of vertical adjustment with respect to said base structure, a slide frame structure connected with the lower extremity of said actuator member and interposed between the aforesaid frame and base structures, said slide frame structure being slidable upon and accurately guided by said upright parallel elements in response to movement of said actuator member, a work supporting section associated with said base structure, and means on said slide frame structure for accommodating a pressing tool.

8. A portable type press mechanism including a base structure, upright shafts extending from and secured rigidly to said base structure, a transverse frame structure vertically spaced from said base and interlocked with said shafts toward the upper extremities thereof so as to cooperate with said base structure in maintaining said shafts in accurate parallelism, said frame structure having a section extending laterally from said shafts to provide an actuator support, actuator mechanism carried by said support including a vertically reciprocable actuating member, rack and pinion means for reciprocating said member, a slide frame slidably carried by said shafts between the aforesaid frame and base structures, said slide frame having a section extending laterally from one of said shafts and located beneath the actuator support of the other frame structure, means coupling the lower extremity of said actuator member with the lateral extension of said slide frame, a work supporting section associated with said base structure beneath the extension of said slide frame, and means on said slide frame structure in the vicinity of the lower extremity of said actuator member for accommodating a pressing tool.

9. A portable type press mechanism including a base structure, upright cylindrical elements extending from said base and presenting spaced i e han on r t Y e' SsQcw -at q lzq w s ide. fr m h uc u q q m j d with rngl'lqwe rf extremity oi 's a id aptuatoifme'mhqr" apd-i'int r 1O p se DQGWEQIP thqifiwesfaii 'i m fl and; a tm t res, saidflide .fiam fl f ru i rq av n r alabear n n ayfi lidab qu n an, a lygumeai y. sa d p izmp ra e ilemfinfi in? smnsq t l ov me t bf a d r fl atq imem- 15 h a o k. lappqr in leq aw ite fwith S id h s? t uqtur. a d; nieai l ssb a dwi ai ideirmet m, ux mta p mm v. r n )v 5 A n ttabl WPQP17Q mqhar m a 5.53% 20 r h n i fll i ie i lj hei an I with th slide 'fra'mg "91; ar'icdz'r'lmfcqqdping alpf ing tool includes aLcentr da i n el n ate?! oo, 8? mean /posi nfidfw I prptmnbl,y

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